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| author |   Heiko Carstens <heiko.carstens@de.ibm.com> | 2006-09-20 15:58:41 +0200 |
|---|---|---|
| committer |   Martin Schwidefsky <schwidefsky@de.ibm.com> | 2006-09-20 15:58:41 +0200 |
| commit | 65912a84c0f33304fa5ea004c7b6ee58d5f5572e (patch) | |
| tree | a9a684ed713f09cd47d6bd1cfe6872cf757feb58 /arch/s390/kernel/head.S | |
| parent | [S390] add kprobes support. (diff) | |
| download | linux-dev-65912a84c0f33304fa5ea004c7b6ee58d5f5572e.tar.xz linux-dev-65912a84c0f33304fa5ea004c7b6ee58d5f5572e.zip | |
[S390] initrd vs. bootmem bitmap.
Move initrd if the bitmap of the bootmem allocator would overwrite it.
In addition this patch sets the default size and address of the initrd to 0.
Therefore all boot loaders must set the initrd size and address correctly.
This is especially relevant for ftp boot via HMC/SE, where this change
requires a special patch file entry in the .ins file which sets these two
values contained at address 0x10408 and 0x10410.
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390/kernel/head.S')
| -rw-r--r-- | arch/s390/kernel/head.S | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/arch/s390/kernel/head.S b/arch/s390/kernel/head.S index adad8863ee2f..a6e9bdb53591 100644 --- a/arch/s390/kernel/head.S +++ b/arch/s390/kernel/head.S @@ -272,7 +272,7 @@ iplstart: # load parameter file from ipl device # .Lagain1: - l %r2,INITRD_START+ARCH_OFFSET-PARMAREA(%r12) # ramdisk loc. is temp + l %r2,.Linitrd # ramdisk loc. is temp bas %r14,.Lloader # load parameter file ltr %r2,%r2 # got anything ? bz .Lnopf @@ -280,7 +280,7 @@ iplstart: bnh .Lnotrunc la %r2,895 .Lnotrunc: - l %r4,INITRD_START+ARCH_OFFSET-PARMAREA(%r12) + l %r4,.Linitrd clc 0(3,%r4),.L_hdr # if it is HDRx bz .Lagain1 # skip dataset header clc 0(3,%r4),.L_eof # if it is EOFx @@ -323,14 +323,15 @@ iplstart: # load ramdisk from ipl device # .Lagain2: - l %r2,INITRD_START+ARCH_OFFSET-PARMAREA(%r12) # addr of ramdisk + l %r2,.Linitrd # addr of ramdisk + st %r2,INITRD_START+ARCH_OFFSET-PARMAREA(%r12) bas %r14,.Lloader # load ramdisk st %r2,INITRD_SIZE+ARCH_OFFSET-PARMAREA(%r12) # store size of ramdisk ltr %r2,%r2 bnz .Lrdcont st %r2,INITRD_START+ARCH_OFFSET-PARMAREA(%r12) # no ramdisk found .Lrdcont: - l %r2,INITRD_START+ARCH_OFFSET-PARMAREA(%r12) + l %r2,.Linitrd clc 0(3,%r2),.L_hdr # skip HDRx and EOFx bz .Lagain2 @@ -379,6 +380,7 @@ iplstart: l %r1,.Lstartup br %r1 +.Linitrd:.long _end + 0x400000 # default address of initrd .Lparm: .long PARMAREA .Lstartup: .long startup .Lcvtab:.long _ebcasc # ebcdic to ascii table |